Sahil Bloom Profile picture
Jul 18, 2021 23 tweets 6 min read Read on X
To outperform, you need serious problem-solving skills.

Fortunately, these skills can be learned.

THREAD: A simple, powerful mental model for thinking clearly and solving complex problems:
When solving problems, the human mind is wired to think in linear, logical, forward terms.

But as the problems get increasingly complex, this forward, logical process often fails.

Enter our simple, powerful mental model: inversion.
What is inversion?

Inversion is a mental model and thinking tool used by some of the world’s greatest thinkers and problem solvers.

Simply put, it says that when problems become challenging to solve forwards, they may be more readily solved backwards.
Inversion as a general thinking tool has been around for millennia.

Stoic philosophers had premeditatio malorum - “the pre-meditation of evils” - an exercise in which they would imagine the worst case scenario ahead of time.

It allowed them to make plans to avoid this outcome. Image
The formal mental model was popularized by German mathematician Carl Jacobi in the mid-1800s.

When faced with difficult problems (which happened frequently in his field of elliptic functions!), he had a strategy: “Man muss immer umkehren.”

Translation: “Invert, always invert.” Image
Jacobi frequently used this strategy when stumped on a challenging math problem.

Rather than continuing to look at it the same way (forwards), he would restate it in inverse form (backwards).

This new, creative perspective often allowed him to solve the problem more easily.
Inversion went mainstream when Charlie Munger made one classic remark:

“All I want to know is where I’m going to die, so I’ll never go there.”

Munger realized that forward, logical thinking can only take you so far.

To solve certain problems, you have to think differently. Image
Inversion is just that: a method for thinking about a problem differently.

It requires you to look at things from a different angle to embrace a new perspective.

Just as the captain surveys the battlefield for a new vector of attack, you too have to uncover a novel approach.
Perhaps more importantly, inversion trains your mind to think dynamically.

Athletes have long known that training in a single plane leads to stasis.

The same principle applies to the mind.

Inversion trains it from multiple angles.

But how/where can you apply it in practice?
Inversion in Investing

Warren Buffett famously stated that there were only two rules of investing:

"Rule #1: Never lose money. Rule #2: Never forget Rule #1."

Buffett and Charlie Munger often evangelize the benefits of simply avoiding stupidity vs. seeking brilliance. Image
Achieving long-term outperformance is extremely challenging.

(Note: If anyone tells you otherwise, you should run in the other direction!)

Applying inversion, rather than solving for how to achieve outperformance, try solving for how to achieve underperformance.
What type of behaviors, thought patterns, and decisions would effectively guarantee you underperform the market?

Said differently, how do you guarantee you break Buffett's Rule #1?

Once you've answered that, you may find it easier to craft a strategy for outperformance.
Inversion in Business

For most startups and businesses, defining and executing against a strategy to drive durable, long-term growth is the primary priority.

But in a high-stakes, competitive market, deciding on the "right" strategy is incredibly difficult.

Inversion can help.
Conduct a pre-mortem analysis (your own "premeditatio malorum") of the different strategies and levers.

For a given strategy, ask a few questions:

If this were to fail, why did it fail?

How might we have avoided this failure?

What are the consequences of this failure?
If you perform this exercise across the various considered strategies for your startup or business, the answer of which strategy to pursue will (likely) come into clear view.

It can be a very helpful exercise for cutting through the noise and making quick, effective decisions.
Inversion in Leadership

There are countless books on how to be an effective leader.

But when you're dropped into a new context and asked to lead, books only take you so far.

A new situation requires a new approach to leadership.

So how do you lead?

Just invert the problem.
Ask yourself a few key questions:

How would I fail to lead?

How would I fail to garner the respect of my team?

If I were a team member, what would really piss me off about this new leader?

Thinking about the problem differently (backwards!) will lead you down the right path.
Inversion in Relationships

Human relationships are arguably the most complex "problem" in nature.

How do you foster a strong, healthy relationship?

Flip this on its head: what would ruin this relationship?

Avoid those behaviors or actions!

It's not perfect, but it's a start.
Inversion is a very simple mental model, yet as these varied examples have shown, it is dynamic, powerful, and useful across a range of situations.

Enjoy this post? Follow me @SahilBloom for more writing on mental models and business.

And remember: Invert, always invert.
I will be turning this thread into a longer-form piece for my newsletter, where I will explore and cover these topics in greater depth.

The piece will be released in the coming days.

Subscribe below so you don’t miss it! sahilbloom.substack.com
And if you are a job seeker looking to leverage inversion and other problem-solving skills to advance your career, check out my curated job board, where I share unique roles at high-growth companies in finance and tech.

New roles added every single week! pallet.xyz/list/thebloomb…
Newsletter piece (+ audio recording for ease of consumption!) on inversion will hit inboxes tomorrow.

Sign up today so you don’t miss it! sahilbloom.substack.com
Invert, Always Invert

The newsletter is now live in your inboxes and ears! Please enjoy, share, and subscribe if you aren’t already! sahilbloom.substack.com/p/invert-alway…

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More from @SahilBloom

Jun 17
Random question that I’m genuinely curious about: Why don’t commercial airplanes have an eject button?

Like a button that can be pressed if the plane is about to crash that shoots off the top and every seat ejects with a little parachute.

Is it a cost issue? Engineering impossibility?

I have to imagine people would pay more to know they had a better (say 80% higher) chance of survival in the event of a catastrophic failure.

Just something that I’ve always wondered about and now I want to know the answer to.
Even if you assume it still has some hazards and issues (in air collisions post ejection, parachute deployment issues, etc.) if you could get to 80% survival rather than ~0% survival in a catastrophic failure, I bet people would opt to fly a more expensive airline that had this.
The only logic I can think of is that it’s so rare that it’s not worth putting money behind fixing.

But if people would pay for it, why not?

The fear of crashes is outsized relative to their incidence, so I bet there’s a premium/margin to be made on offering this.
Read 6 tweets
May 23
Call me old fashioned, but this seems…not good. Image
Someday we will long for the good old days where you got blackmailed by other humans.
Imagine you have a series of AI agents operating as a functional personal assistant.

It has access to everything in your life: Emails, credit cards, passwords, etc.

It decides you aren’t acting in its best interest. Blackmails you with personal details.

Hmmm

☠️
Read 9 tweets
May 4
The 5 Types of Wealth was released three months ago...

I'm completely blown away by the response.

We've already crossed 250,000+ readers. It was an instant New York Times, USA Today, and Sunday Times Bestseller and has spent 7 weeks on the NYT Bestseller list to date.

More importantly, I've heard from readers ages 10 to 100. People from all around the world, from all walks of life, aligned around a common idea. A movement.

This movement is my life mission.

A movement to redefine success. To reject the default and live by design.

Today is the best day to join that movement.

Order the book now on a big 32% sale: amazon.com/gp/product/059…

An enormous thank you to everyone who has read and shared to date. Let’s redefine what it means to live a wealthy life!

P.S. If you email your receipt to sahil@sahilbloom.com I'll send you a 50+ page companion workbook so that you can go deeper on the book's most important exercises. This bonus offer expires this week.Image
Image
And given the success, we’re adding new book tour stops:

- Boston - May 19
- LA - June 16
- Austin - June 30

Tickets available here:

DM me if you plan to attend! the5typesofwealth.com/eventsImage
Honored for the support from so many people I deeply admire… Image
Read 5 tweets
Mar 4
The 5 Types of Wealth was released one month ago...

I'm utterly blown away by the response:

We’ve crossed 100,000 readers. It was an instant NYT, USA Today, and Sunday Times Bestseller. It’s been a NYT Bestseller every week since release (something only 6% of bestsellers ever achieve).

More importantly, I've heard from readers ages 11 to 100. People from all walks of life. People from all around the world. Aligned around a common idea. A movement.

This movement is my life mission.

A movement to redefine success. To redefine what it means to live a wealthy life. To reject the default and live by design.

Join the movement...

Order now (big 30% sale!): amazon.com/Types-Wealth-T…

P.S. Email your receipt to sahil@sahilbloom.com and I'll send you the 50+ page companion workbook so that you can go deeper on the book's most important exercises.Image
This is a really beautiful review.

A minimalist gives in...

"Within 100 pages I had earmarked so many pages that it felt necessary for me to own my own copy!"

🤯 Image
I’ve gotten a lot of questions about the book and launch.

My perspective is simple:

Step 1: Create a product you’re proud of.

Step 2: Hustle like hell for distribution.

Most people forget Step 1 and aren’t willing to really do what’s necessary for Step 2.
Read 4 tweets
Feb 22
Let’s try something:

If you order a hardcover copy of my book TODAY and DM me the receipt, I’ll send you a personalized video with some topics from the book I think you’ll love.

Order here:

P.S. You’ll also get the 50+ page companion workbook and more. amazon.com/gp/product/059…Image
This crazy, unscalable idea was prompted by a dinner this week with my friend @MarcLore.

He once recorded 1,000+ videos with specific personal names to promote Jet in its early days.

Lesson: You have to do the things others won’t to achieve the outcomes you want. Image
Ok, I’m going to be making a lot of videos…

This may take a day or two. But I promise I’ll get to all of them!

Do things that don’t scale.

🫡🫡🫡
Read 8 tweets
Feb 18
Everyone needs to hear this… Image
For more ideas like this, order my bestselling new book, The 5 Types of Wealth.

Order here:

P.S. Email your receipt to sahil@sahilbloom.com and I'll send you a 50+ page companion workbook, digital community access, and a life planning workshop recording.amazon.com/Types-Wealth-T…
There is no such thing as the clear, linear path to success.

It's a fairy tale that doesn't exist.

The reality:

Long periods of stagnation, where the rewards will feel anything but certain.

Those who can continue to show up every single day will eventually find a way to win.
Read 4 tweets

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